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EX-803 (A) RGPV B.Tech

Power Electronics Converters for Renewable Energy (PECRE)

Previous year papers and the official syllabus are free to read, no account needed.

Previous Year Papers

1 paper, latest May 2023

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Open the paper

Syllabus, notes and important questions for EX-803 (A)

Syllabus units

Topics as the official RGPV syllabus lists them.

Unit 1 Introduction to renewable sources 12 topics
  • World energy scenario and renewable sources
  • Wind, solar, hydro, geothermal fundamentals
  • Availability and power extraction of renewable sources
  • Photovoltaic effect and basics of solar power generation
  • P‑V and I‑V characteristics of PV modules
  • Effects of insolation, temperature and shading on PV performance
  • PV modules, connections, ratings, and array design
  • Maximum power point (MPP) tracking concepts and schemes
  • Solar tracking methods
  • Standalone PV systems and grid‑interfaced systems
  • Energy storage options for PV applications
  • AC‑DC load considerations
Unit 1 notes
Unit 2 Power converters for solar 6 topics
  • Micro‑converter topologies
  • DC‑DC buck, boost, buck‑boost, flyback, forward, and Cuk converters
  • Bidirectional DC‑DC converters for PV applications
  • Single‑phase and three‑phase inverter configurations
  • Multilevel inverter types: Neutral‑point‑clamped, Modular‑multilevel, CSI
  • Control schemes for inverters: unipolar and bipolar modulation
Unit 2 notes
Unit 3 Single‑phase and three‑phase back‑controllers 7 topics
  • Triggering techniques for power‑factor and harmonic control
  • Design and analysis of phase‑control circuits
  • Solid‑state transfer switches
  • Cycloconverter concepts: three‑phase to single‑phase and vice‑versa
  • Effect of source inductance on converter operation
  • PWM techniques: single‑pulse and multi‑pulse forms
  • STATCON, SVC, UPS and SMPS operation principles
Unit 3 notes
Unit 4 Introduction to wind energy 9 topics
  • P‑V and I‑V characteristics of wind turbines
  • Wind turbine‑generator‑inverter system architecture
  • Mechanical control and ratings of wind turbines
  • Maximum power point (MPP) and MPPT schemes for wind
  • PLL and synchronization techniques for wind converters
  • Power balancing and bypass strategies
  • Grid‑connection issues: leakage current, islanding, harmonics
  • Harmonic mitigation using passive and active filters
  • Active/reactive power feeding and unbalance compensation
Unit 4 notes
Unit 5 Generators for wind and battery systems 6 topics
  • DC generator with DC‑to‑AC converter interfaces
  • Induction generators with and without converters
  • Synchronous generators with back‑to‑back controlled/uncontrolled converters
  • Doubly‑fed induction generator topologies and rotor‑side converters
  • Permanent‑magnet based generators for wind applications
  • Battery technologies: types, charging and discharging methods
Unit 5 notes
Read the full syllabus

Exam insights

Counted from 5 past EX-803 (A) papers.

Marks asked per paper, by unit

  • Unit 1 Introduction to renewable sources 7 marks
  • Unit 2 Power converters for solar 8 marks
  • Unit 3 Single‑phase and three‑phase back‑controllers 0 marks
  • Unit 4 Introduction to wind energy 7 marks
  • Unit 5 Generators for wind and battery systems 0 marks

Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.

Asked again and again

  1. Explain Maximum Power Point Tracking (MPPT) techniques for photovoltaic (PV) systems.

    Asked 4 times: 2022, 2023, 2024, 2025

  2. Derive the voltage‑current relationship of a buck converter and calculate its duty cycle for a given output.

    Asked 3 times: 2022, 2023, 2025

  3. Discuss the operation and advantages of a three‑phase voltage source inverter (VSI) for grid‑connected solar.

    Asked 3 times: 2022, 2024, 2025

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